body {
    font-family: Arial, sans-serif;
    background-image: url('../images/background.png'); /* 设置背景图片 */
    background-size: cover; /* 使背景图片覆盖整个页面 */
    background-position: center; /* 将背景图片居中 */
    background-repeat: no-repeat; /* 防止背景图片重复 */
    margin: 0;
    padding: 0;
}

.container {
    width: 300px;
    margin: 100px auto;
    padding: 20px;
    background: rgba(255, 255, 255, 0.9);
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}
.message{
    font-size: 25px;
    color: red;
    line-height: 1.5;
    text-align: center;
}
h2 {
    text-align: center;
    color: #333;
}

form {
    display: flex;
    flex-direction: column;
}

label {
    margin-bottom: 5px;
}

input[type="text"],
input[type="password"],
input[type="submit"]{
    padding: 10px;
    margin-bottom: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    text-decoration: none;
}

input[type="submit"]{
    background-color: #337ab7;
    color: white;
    border: none;
    cursor: pointer;
}

input[type="submit"]:hover{
    background-color: #286090;
}

.message {
    color: red;
    font-weight: bold;
    text-align: center;
    margin-bottom: 10px;
}